[프로그래머스]JS 크레인 인형뽑기 게임

https://programmers.co.kr/learn/courses/30/lessons/64061?language=javascript 

코딩테스트 연습 - 크레인 인형뽑기 게임

function solution(board, moves) {
  let answer = 0;
  let stack = [0];
  let depth = board.length;
  for (let i = 0; i < moves.length; i++) {
    for (let j = 0; j < depth; j++) {
      let curhead = board[j][moves[i] - 1];
      if (curhead != 0) {
        let preHead = stack.pop();
        if (curhead != preHead) {
          stack.push(preHead);
          stack.push(curhead);
          board[j][moves[i] - 1] = 0;
        } else {
          board[j][moves[i] - 1] = 0;
          answer++;
        }
        break;
      }
    }
  }
  return answer * 2;
}